linux-kernel - Re: [PATCH] ARM: dts: imx7-colibri: Fix frequency for sd/mmc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Wed, 19 Feb 2020 09:48:35 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
Cc:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Igor Opanyuk <igor.opanyuk@...adex.com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        Mark Rutland <mark.rutland@....com>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Stefan Agner <stefan@...er.ch>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: dts: imx7-colibri: Fix frequency for sd/mmc

Hi Oleksandr,

On Wed, Feb 19, 2020 at 8:57 AM Oleksandr Suvorov
<oleksandr.suvorov@...adex.com> wrote:
>
> SD/MMC on Colibri iMX7S/D modules successfully support
> 200Mhz frequency in HS200 mode.

s/Mhz/MHz

>
> Removing the unnecessary max-frequency limit significantly
> increases the performance:
>
> == before fix ====
> root@...ibri-imx7-emmc:~# hdparm -t /dev/mmcblk0
> /dev/mmcblk0:
>  Timing buffered disk reads: 252 MB in  3.02 seconds =  83.54 MB/sec
> ==================
>
> === after fix ====
> root@...ibri-imx7-emmc:~# hdparm -t /dev/mmcblk0
> /dev/mmcblk0:
>  Timing buffered disk reads: 408 MB in  3.00 seconds = 135.94 MB/sec
> ==================

Nice improvement :-)

>
> Fixes: f928a4a377e4 ("ARM: dts: imx7: add Toradex Colibri iMX7D
>                       1GB (eMMC) support")

Please keep the Fixes tag in a single line.

Reviewed-by: Fabio Estevam <festevam@...il.com>